Rubberlike polymerization products from vinyl carbazole and solid polymerized isobutylene



Patented Nov. 14, 1 939 The present invention relates to rubberlikepolyme ization products anda process of prorindng same.

We have found that rubberlike polymerization 5 products are obtained bypolymerizing vinyl carhassle in the presence of solid, highlypolymerized It is preferable to roll monomeric vinyl earhazole into thepolymerized isobutylene and to heat the resulting product for some time.Tine procedure may be, however, that solid polymerizw isobutylene or asolution of polymerized isobutylene-is added to vinyl carbazole also inisobutylene.

fissoived form.

RUBBERLIKE POLYMERIZATION PRODUCTS I FROM VINYL CARBAZOLE AND SOLIDPOLYMERIZED ISOBUTYLENE Martin Mueller-Cunradi and Walter Daniel,Ludwigshaien-on-the-Rhine, Germany, assignors to I. G. FarbenindustrieAktiengesellschait,

Frankiort-on-the-Main, Germany No Drawing. Application January 7, 1938,Serial No. 183,797. In Germany April 14, 1937 3 Claims. (Cl. 260-42)timeter E=recoil elasticity B=tensile extension in per cent C=tension(modulus) at 300 per cent D=tension (modulus) at 500 per cent F=Shorehardness in degrees at C.

Table polymerization is effected by heating to 151 0. for one hour. Themechanicalproperties listed in the table are as follows:

A=tensile strength in kilograms per square cen- In the said manner, evenwhen using small I meclzation are obtained.

The following table gives the-values obtained by testing the mechanicalproperties of pure isobutylene and oi. interpolyrnerizatlon products ofpolymerized isobutylene and vinyl according to this invention. The

amounts of vinyl carbazole, as for example 2 per cent, there is obtainedafter heating a polyproduct having higher tensile strength, lowertensile extension, increased hard-l ness and also somewhat higher.recoil elasticity than polymerized isobutylene alone. A; polymerizationproduct having such a small porportion of vinyl carbazole may bewithdrawn from the preswhile hot and retains its shape, whereas pm'epolymerized isobutylene under the same conditions changes its shape evenafter storage for a few hours. Larger amounts of vinyl carbazole mayalso be used. By increasing the proportion of vinyl carbazole,polymerizationproducts of increasing hardness and decreasing extensionPolymerized isobutylene Polymerized lsobutylene+2 per cent of vinylcarbazole Polymerized isobutylene-+7.5 per cent oi vinyl carbazolePolymerized lsobutylene+20 per cent of vinyl carbazoleufl OOIOI I- iv-OOO What we claim is:

polymerized isobutylene.

MAR'I'IN 1. A process of producing rubberlike polymerization products,which comprises polymerizing vinyl carbazole in the presence of solid,highly

